/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * We modify this part of the code based on Apache Flink to implement native execution of Flink operators.
 * Copyright (c) Huawei Technologies Co., Ltd. 2025. All rights reserved.
 */

#include "AvailabilityProvider.h"
#include <sstream>

namespace omnistream {

    std::shared_ptr<CompletableFuture> AvailabilityProvider::AVAILABLE = std::make_shared<CompletableFuture>();

    std::shared_ptr<CompletableFuture> AvailabilityProvider::and_(std::shared_ptr<CompletableFuture> first, std::shared_ptr<CompletableFuture> second)
    {
        if (first == AVAILABLE && second == AVAILABLE) {
            return AVAILABLE;
        } else if (first == AVAILABLE) {
            return second;
        } else if (second == AVAILABLE) {
            return first;
        } else {
            return CompletableFuture::allOf(std::vector<std::shared_ptr<CompletableFuture>>{first, second});
        }
    }

    std::shared_ptr<CompletableFuture> AvailabilityProvider::or_(std::shared_ptr<CompletableFuture> first, std::shared_ptr<CompletableFuture> second)
    {
        if (first == AVAILABLE || second == AVAILABLE) {
            return AVAILABLE;
        }
        return CompletableFuture::anyOf(std::vector<std::shared_ptr<CompletableFuture>>{first, second});
    }


} // namespace omnistream
